Get matched with top mulch and topsoil pros in Monroe, WI

Sand is a common sublayer for hardscape features like driveways, paver patios, and more. Most projects that involve sand require a 1-inch layer to promote evenness, drainage, and weight distribution. For further drainage, most projects have a 6-inch minimum layer of gravel beneath the sand. 

Mulch is made from natural materials, which will break down and add nutrients to your soil for better plant and soil health, so removing old mulch is unnecessary before putting down new mulch. However, if you live in a particularly moist area, it’s possible that the old mulch will harbor fungus or mold, which can hurt plant health. If you notice these issues, you might want to consider removing the old mulch first. Otherwise, save time and money by placing new mulch right over the old mulch.

Pea gravel is the most common type of gravel, and it can be made of limestone, granite, basalt, sandstone, and many other types of rock. The strength in gravel comes from the distribution across the stones, so while one rock type may not be particularly strong (like sandstone), the matrix of small rocks that is gravel can become incredibly strong when installed correctly. 

Wood from black walnut, magnolia, eucalyptus, red maple, and invasive species like tree of heaven are not recommended for mulching. These trees release allelochemicals that can suppress plant growth. Some homeowners, however, use wood from these trees for mulching if it is less potent due to age or concentration, or if the plants are not as sensitive to them.